The dumbing down of American is most evident in the slow decay of substantive content in the enormously influential media, the 30 second sound bites (now down to 10 seconds or less), lowest common denominator programming, credulous presentations on pseudoscience and superstition, but especially a kind of celebration of ignorance.
You just have to be careful because social media can begin to affect personal things such as relationships, just to pin point. People have become so entitled as it relates to social media.